dcfluid

It is under pressure, when you are under boost it will have approximately the same pressure as your intake manifold reading.
A VERY small hole allows build up to drain, and pressure helps push the fluids out.
What was discussed was that many OEM intercoolers have had a hole like this in the past, and the fact such a small hole has zero effect on truck performance or reliability.

papa tiger

Charge pressure will push out the accumulated Gunk before it builds to a point it navigates up the tube into the intake manifold in a large enough quantity and becomes a non burnable part of the ignition process affecting the motor. A win/win for you. Narrowing the spark plug gap is also beneficial.

EricTheOracle

dcfluid, I got into an argument about this with a diesel tech and so today I dropped my air dam and made a video to prove the point as I'm the guy who started the weep hole in the intercooler solution in the first place (which got picked up and popularized by others)

Anyway, at idle there is insufficient volume to develop any notable pressure. However, the big idea is if the weep hole ever draws vacuum, and it does not. As a result, I wouldn't worry about a weep hole at the bottom of the intercooler unless one is crossing a flooded road or doing water crossings. In those conditions, a nipple should be installed, and a breather line popped on that vents at a higher place.

papa tiger

For those with the problem, the lubrication oil part that is Synthetic is made by obtaining Ethane Gas from A natural gas well, converting the Ethane gas to Liquid oil form of Synthetic oil and then giving the clear liquid color with a additive package. When the oil is then pumped onto the bottoms of red hot pistons it vaporizes and is drawn into the Driver side Turbo and CAC where it Condenses with a mixture gasoline vapors, water Vapor and bubbles into a gluck. This then is drawn into the motor driver side cylinders and misfires as it is basically unburnable in the normal ignition sequence. So if it is removed with the drilled hole the problem disappears perty much.
I proved it to myself by simply putting a Can on the Clean air side and trapping it there. So with the drilled hole it escapes exceedingly well. All should do the hole and with a small screw it can be plugged if necessary.

dcfluid

I have a few small sheet metal screws and a #0 Robertson screw driver in my truck that I plug the small hole with once in a while to see if I collect any build up in the CAC.
I sort of gave up on the back and forth checking and just leave the hole open now.

chrisuf2000

I guess worst case if I drill this small hole and there is a problem then I can plug it up... I'm very curious to see what, if anything, will come out. I mainly just do relatively short driving trips around town and hardly ever long trips in one run.

dcfluid

Exactly my thought with the screw.
I drilled a 1/16 hole in the lowest point of the plastic end tank by the outlet hose. Drill in a spot and angle with your drill that allows you to reach it with your screw and driver to plug it easily when ever you wish.
I can only think that parking in bumper deep water and taking the truck in for warranty as reasons for plugging it.

papa tiger

What you are having is vaporization of many chemicals in the block as the motor warms up and the loss of PCV clean air function into the block. The vapors build up, air is removed from the water as it is vapor and water than combines with the oil vapors spontaneously as it is moving from the valve cover to condense in the CAC. A Chemist named Ric Pashley proved it. You see water likes/uses something to condense to/with if it is present, usually a dust speck or the like so it just latches onto the oil. Long term steady state driving keeps the fresh air flow into the block at a minimum and the vapors passing thru the hose from the valve cover to the driver side Turbo are almost pure Combustion process/internal block created. If the air had time to re-saturate with fresh air, air bubbles are back into the water, they will change water to a more resistant to oil saturation liquid. But what you get is the oil mix with water working its way out the drill hole while/when it is happening and that mix is a heavier/tackier mess than the separate chemicals would be. I have caught enough of it to answer my own worries and sleep well not that it is going to break a piston or worse hydro locking.


Cool thing to do is drill the tiny hole and not second guess it.

Wannafbody

Drivers side or passenger side for the hole?

dcfluid

Drivers side. Look for the hose at the bottom drivers side, that is the outlet of the CAC. Follow the hose routing and you will see the path from air filter thru turbos, into top of CAC, out bottom of CAC, up to into intake manifold.